Side-by-side specifications of the Synology DS2015xs and DS2411+, from official datasheets. Differences are highlighted.
| DS2015xs | DS2411+ | |
| CPU | quad-core CPU | — |
| Cores / threads | 4 cores | — |
| RAM (base) | 2 GB | 1 GB |
| RAM (max) | 8 GB | 3 GB |
| Drive bays | 8 | 12 |
| Expandable to | 12 | 12 |
| M.2 slots | 0 | 0 |
| Network | 2 x 10GbE SFP+; 2 x 1GbE RJ-45 | 2x Gigabit |
| 10GbE | yes | no |
| Max raw capacity | 48 TB internal; 108 TB maximum file system size | 72 TB |
| Hot-swap | yes | yes |
| Form factor | desktop | tower |
| Released | 2015 | 2011 |
| Power consumption | — | 104.5 W / 38.5 W |
| DSM at launch | — | — |
Choose the DS2015XS if you want the faster CPU, higher RAM ceiling, built-in 10GbE, and M.2/NVMe cache support; it’s the stronger platform for performance-focused SMB use. Choose the DS2411+ only if you need the extra 12-bay chassis and its expansion-oriented design, since it lacks the XS model’s newer CPU/RAM and 10GbE/M.2 advantages.